421331123 has 4 divisors (see below), whose sum is σ = 421794528. Its totient is φ = 420867720.

The previous prime is 421331117. The next prime is 421331153. The reversal of 421331123 is 321133124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421331123 - 2⁶ = 421331059 is a prime.

It is a super-2 number, since 2×421331123² = 355039830416882258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421331095 and 421331104.

It is not an unprimeable number, because it can be changed into a prime (421331153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230336 + ... + 232157.

It is an arithmetic number, because the mean of its divisors is an integer number (105448632).

Almost surely, 2^421331123 is an apocalyptic number.

421331123 is a deficient number, since it is larger than the sum of its proper divisors (463405).

421331123 is an equidigital number, since it uses as much as digits as its factorization.

421331123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463404.

The product of its digits is 432, while the sum is 20.

The square root of 421331123 is about 20526.3519164999. The cubic root of 421331123 is about 749.6775639183.

Adding to 421331123 its reverse (321133124), we get a palindrome (742464247).

The spelling of 421331123 in words is "four hundred twenty-one million, three hundred thirty-one thousand, one hundred twenty-three".